Update environment on 2018-02-06 (#108)

This build is based on
310dd07.

This commit was created by the following Travis CI build and job:
https://travis-ci.org/greenelab/manubot-rootstock/builds/338192586
https://travis-ci.org/greenelab/manubot-rootstock/jobs/338192587

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The full commit message that triggered this build is copied below:

Update environment on 2018-02-06 (#108)

Fix upstream issues:

Extra brackets around citations in figure captions
jgm/pandoc#4272

WeasyPrint 0.42 gets stuck
Kozea/WeasyPrint#560

Updated pandoc-xnos with better semantic versioning
tomduck/pandoc-fignos#46

manuscript.html

@@ -6,7 +6,7 @@
   <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" />
   <meta name="author" content="John Doe" />
   <meta name="author" content="Jane Roe" />
-  <meta name="dcterms.date" content="2018-02-01" />
+  <meta name="dcterms.date" content="2018-02-06" />
   <meta name="keywords" content="markdown, publishing, manubot" />
   <title>Manubot Rootstock: Manuscript Title</title>
   <style type="text/css">
@@ -28,7 +28,7 @@
 <header>
 <h1 class="title">Manubot Rootstock: Manuscript Title</h1>
 </header>
-<p><small><em> This manuscript was automatically generated from <a href="https://github.com/greenelab/manubot-rootstock/tree/a535f7b872df775b1557f90b01402bbd56d17517">greenelab/manubot-rootstock@a535f7b</a> on February 1, 2018. </em></small></p>
+<p><small><em> This manuscript was automatically generated from <a href="https://github.com/greenelab/manubot-rootstock/tree/310dd078c4c60bedd63442f93906f26a4ea25a4b">greenelab/manubot-rootstock@310dd07</a> on February 6, 2018. </em></small></p>
 <h2 id="authors">Authors</h2>
 <ul>
 <li><p><strong>John Doe</strong><br> <img src="images/orcid.svg" alt="ORCID icon" width="13" height="13" /> <a href="https://orcid.org/XXXX-XXXX-XXXX-XXXX">XXXX-XXXX-XXXX-XXXX</a> · <img src="images/github.svg" alt="GitHub icon" width="13" height="13" /> <a href="https://github.com/johndoe">johndoe</a> · <img src="images/twitter.svg" alt="Twitter icon" width="13" height="13" /> <a href="https://twitter.com/johndoe">johndoe</a><br> <small> Department of Something, University of Whatever · Funded by Grant XXXXXXXX </small></p></li>

manuscript.md

@@ -2,7 +2,7 @@
 author-meta:
 - John Doe
 - Jane Roe
-date-meta: '2018-02-01'
+date-meta: '2018-02-06'
 keywords:
 - markdown
 - publishing
@@ -18,8 +18,8 @@ title: 'Manubot Rootstock: Manuscript Title'
 
 <small><em>
 This manuscript was automatically generated
-from [greenelab/manubot-rootstock@a535f7b](https://github.com/greenelab/manubot-rootstock/tree/a535f7b872df775b1557f90b01402bbd56d17517)
-on February  1, 2018.
+from [greenelab/manubot-rootstock@310dd07](https://github.com/greenelab/manubot-rootstock/tree/310dd078c4c60bedd63442f93906f26a4ea25a4b)
+on February 6, 2018.
 </em></small>
 
 ## Authors

variables.json

@@ -1,5 +1,5 @@
 {
-  "date": "February  1, 2018",
+  "date": "February 6, 2018",
   "authors": [
     {
       "github": "johndoe",
@@ -44,7 +44,9 @@
   ],
   "ci_source": {
     "repo_slug": "greenelab/manubot-rootstock",
-    "commit": "a535f7b872df775b1557f90b01402bbd56d17517"
+    "repo_owner": "greenelab",
+    "repo_name": "manubot-rootstock",
+    "commit": "310dd078c4c60bedd63442f93906f26a4ea25a4b"
   },
   "manuscript_stats": {
     "reference_counts": {